While I am waiting for my arduino to arrive. I have been thinking more about what I am trying to achieve.
I have some more questions, if anyone can help.
The housing that the stepper motor is mounted in as ntc glass thermister to measure the oil temp.
1 - Can I connect this thermister to the same arduino board to give a read out to a lcd screen?
2 - Would I be able to code the arduino to turn the stepper "off" when the oil reaches a certain temp. Stepper would need to open the valve to allow oil to flow again? If not, could it activate a LED to indicate the oil temp is high?
3 - Would I be able to connect a LCD read out screen to the same arduino to show oil temp and stepper motor position with relation to the pot being turned?
4 - Lastly, how would I go about setting the stepper back to the "open" position when the power is turned off. I have realised that this is going to be a problem, because if the stepper is in the "closed" position and the power is turned off, then someone turns the pot to the "open" position while the power is off. The stepper won't know that the pot has been moved and when the power is turned on and the pot is turn to the "closed" position, the stepper is going to try push the pin past the "closed" position and strip the rack and pinion gears as the pin won't be able to move further closed.
Is a stepper motor the correct thing to use for this. I was thinking about using a solenoid to push the pin to "closed" position but then I will only have 2 positions, open or closed. Nothing in between, it's not the end of the world but would like to be able to adjust the positions.
Sorry for the dragged out story, would appreciate the experts input on this.